CN107449264A - A kind of polytetrafluoroethyldispersion dispersion resin particle wet feed drying system and method - Google Patents

A kind of polytetrafluoroethyldispersion dispersion resin particle wet feed drying system and method Download PDF

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Publication number
CN107449264A
CN107449264A CN201710832697.2A CN201710832697A CN107449264A CN 107449264 A CN107449264 A CN 107449264A CN 201710832697 A CN201710832697 A CN 201710832697A CN 107449264 A CN107449264 A CN 107449264A
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air
steam
drying
knot screen
low
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CN107449264B (en
Inventor
周昆
游俊
康琪
何涛
曾涛
廖丰杰
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Sichuan Hope & Hot-Pulse Microwave Tech Co Ltd
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Sichuan Hope & Hot-Pulse Microwave Tech Co Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B17/00—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement
    • F26B17/02—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by belts carrying the materials; with movement performed by belts or elements attached to endless belts or chains propelling the materials over stationary surfaces
    • F26B17/04—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by belts carrying the materials; with movement performed by belts or elements attached to endless belts or chains propelling the materials over stationary surfaces the belts being all horizontal or slightly inclined
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/02—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure
    • F26B21/04—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure partly outside the drying enclosure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
    • F26B25/001—Handling, e.g. loading or unloading arrangements
    • F26B25/002—Handling, e.g. loading or unloading arrangements for bulk goods
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
    • F26B25/005—Treatment of dryer exhaust gases
    • F26B25/007—Dust filtering; Exhaust dust filters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B3/00—Drying solid materials or objects by processes involving the application of heat
    • F26B3/02—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air
    • F26B3/06—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour flowing through the materials or objects to be dried
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B3/00—Drying solid materials or objects by processes involving the application of heat
    • F26B3/32—Drying solid materials or objects by processes involving the application of heat by development of heat within the materials or objects to be dried, e.g. by fermentation or other microbiological action
    • F26B3/34—Drying solid materials or objects by processes involving the application of heat by development of heat within the materials or objects to be dried, e.g. by fermentation or other microbiological action by using electrical effects
    • F26B3/347—Electromagnetic heating, e.g. induction heating or heating using microwave energy
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B2200/00—Drying processes and machines for solid materials characterised by the specific requirements of the drying good
    • F26B2200/08—Granular materials
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Microbiology (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Biotechnology (AREA)
  • Molecular Biology (AREA)
  • Drying Of Solid Materials (AREA)

Abstract

The invention discloses a kind of polytetrafluoroethyldispersion dispersion resin particle wet feed drying system and method, belong to organic chemistry technical field of drying.In the present invention, drying device, knot screen, low-temperature air-cooling device and airtight package device are connected by net belt conveying apparatus, form the circulation conveying loop of a tunnel type continuous processing, in order, polytetrafluoroethyldispersion dispersion resin particle wet feed feeding, microwave drying, microwave superheat steam drying and removal of impurities, cooling and airtight package process are effectively completed, and produce that moisture is low, impurity residual is low, without caking, the high-quality polyflon discrete particles without fibrosis, and effectively prevent the influence to environment；Meanwhile the dry materials cycle is short, drying system efficiency high, it is easy to the feedback control automated, suitable for large-scale industrial production.

Description

A kind of polytetrafluoroethyldispersion dispersion resin particle wet feed drying system and method
Technical field
The present invention relates to a kind of wet feed drying system and method, especially, is related to a kind of polytetrafluoroethyldispersion dispersion resin Grain wet feed rapidly, continuously drying system and method, belong to organic chemistry technical field of drying.
Background technology
Polytetrafluoroethylene (PTFE)（PTFE）It is a kind of high-molecular compound, there is excellent high and low temperature resistance and chemically stable Property, and the performance such as low heat conduction of corrosion-resistant, high electrical insulating properties, high fire-retardance.Common polytetrafluoroethylproducts products are with polytetrafluoroethyl-ne Alkene suspending resin powder or dispersion resin particle are made；Wherein, polytetrafluoroethyldispersion dispersion resin particle, it is by monomer tetrafluoroethene （TFE）Added with dispersant, emulsifying agent, initiator water in be polymerized, its polymerization temperature is 40-80 DEG C, pressure is 0.3-2.6MPa, so obtained polytetrafluoroethyldispersion dispersion resin particle is aqueous wet feed, and its moisture content is 40-60%.And according to HG/T3028-1999 is pointed out：Qualified polytetrafluoroethyldispersion dispersion resin particle moisture content should be reduced to less than 0.04%, so It can guarantee that its quality of item is substantially qualified, polytetrafluoroethylene (PTFE) moisture content is more low better, is further reduced to moisture content 0.02%, it is even lower, excellent performance will be shown.
Although polytetrafluoroethylene (PTFE) has higher density, about 2.13-2.23g/cm3, but polytetrafluoroethyldispersion dispersion resin The bulk density of grain is very low, and about 475 ± 100g/L, average grain diameter is about 475 ± 150 μm, such little particle loosely-packed shape Into the accumulation body capacity of heat transmission be far below polytetrafluoroethylproducts products, therefore polytetrafluoroethyldispersion dispersion resin particle can be considered as heat not Good conductor.Moreover, polytetrafluoroethyldispersion dispersion resin particle is compressible, easy caking, not fingerprinting stress and easy fibrosis, and it is high Electrical insulating property is also easy to produce electrostatic, and adsorbs the dust in air；And compress, lump, fibrosis, dust pollution, it can all reduce poly- Tetrafluoroethene dispersion resin particle quality, reduce its product strength, surface flatness reduces and color and luster changes.This Outside, the dielectric constant of polytetrafluoroethyldispersion dispersion resin particle is 2.1, dielectric dissipation factor 3x10-4, absorb the ability pole of microwave It is low, it will not be generated heat in the presence of microwave.Because polytetrafluoroethyldispersion dispersion resin particle has above-mentioned characteristic, enter to its wet feed During row drying, most of drying mode conventional, that efficiency is higher is all difficult to effectively be applied.
The conventional drying process of polytetrafluoroethyldispersion dispersion resin particle is generally Oven Method, such as：Publication No. CN101000208, Patent name is the patent of invention of " drying means of polytetrafluoroethyldispersion dispersion resin ", is heated using first heat exchanger, then be passed through heat Air heats jointly with heat exchanger, and is dehydrated under conditions of negative pressure of vacuum, arid cycle 13-18h；Publication No. CN102914123, patent name are the patent of invention of " a kind of drying means of polytetrafluoroethyldispersion dispersion resin ", are used with air It is heat transfer medium in hot air circulation drier（That is baking oven）Furnace drying method, arid cycle 18-23h.According to drying principles, air At ambient pressure, its specific heat capacity is extremely low, specific discharge hot-air（Hot blast）The heat energy of carrying is very limited；Simultaneously as polytetrafluoro Ethene dispersion resin particle is the non-conductor of heat, and its heat exchange efficiency is low, heat transfer property is poor, and not only thermal waste is big, also makes thing The overall heating of material is slower, therefore, it is necessary to longer time can just make polytetrafluoroethyldispersion dispersion resin particle moisture content be reduced to institute Need level.Just because of energy consumption for drying is higher and arid cycle is very long, and continuous metaplasia is all difficult to using conventional drying process Production, it is difficult to meet the industrial production demand for continuing to increase scale.
In addition, suspending resin powder dries conventional fluid bed drying process, be one kind using hot-air as medium, formation High velocity air makes goods fluid and quick-drying method, when for polytetrafluoroethyldispersion dispersion resin particle drying technique, but Polytetrafluoroethyldispersion dispersion resin particle is squeezed the effect with shearing force because air velocity is too fast, lump, fibrosis, and As waste product.Publication No. CN103148689, patent name are " a kind of belt drying device for preparing dispersion method PTFE resin " Patent of invention is a kind of using conveyer belt conveying material, air as heat transfer medium（Upper entering and lower leaving）Continuous drier, equally by In, the specific heat at constant pressure appearance of air is extremely low, at a certain temperature, specific discharge hot-air（Hot blast）The energy of carrying has very much Limit, simultaneously because polytetrafluoroethyldispersion dispersion resin particle is the non-conductor of heat, heat exchange efficiency is low, heat transfer property is poor, can not only Amount wastes greatly, material is integrally heated up and grows very slow, arid cycle.Therefore, rapid draing is carried out with the patent described device, According to drying principles, low speed hot blast cannot be used, hot air flowrate can only be increased to overcome above mentioned problem, but Wind Volume, height Wind speed can make polytetrafluoroethyldispersion dispersion resin particle a large amount of cakings, fibrosis occur again, especially be that hot-air is enterprising Under go out, air-flow can be formed very big blast on material, make polytetrafluoroethyldispersion dispersion resin by material and conveyer belt windage effect Particle can be softened under the high temperature conditions by relatively very big extruding force and shearing force, the degree of aggravation caking and fibrosis, Therefore the patent can not realize quick, low moisture and the drying without fibrosis simultaneously in actual production, can not reduce energy consumption It is horizontal.And above-mentioned patent all employ air as heat transfer medium, and containing for dust in air is reduced even with filter Amount, but influenceed by the decline of filter filtering accuracy, filter screen quality and strainability, dust can not certainly will be removed totally, And arid cycle is very very long, large quantity of air is finally easy to make for a long time from material by producing Electrostatic Absorption Dispersion resin particle is had a strong impact on the stability of product quality by dust pollution.
Publication No. CN101495830, patent name are " drying means, manufacture method and the manufacture dress of water repellent powder Put " patent of invention, water vapor is first made with microwave heating, and 80 DEG C or so hot-airs is passed through to take away water vapour, material is contained Water rate is down to about 20%, then individually continues heating about 70 minutes with 160 DEG C of hot-airs, finally carries out 155 DEG C to material again, 30min Insulation heat treatment, whole arid cycle is 2-3h.But there is problems with the patent in force：
First, in the first drying process, fed using metal base plate pallet, although being protected according between pallet above and below its patent description Certain altitude is held, enables microwave heated material, but theory is heated according to microwave, metal base plate can reflect, and disturb microwave coupling Close, the microwave efficiency of heating surface will be reduced, so as to cause the process microwave drying time longer, and moisture is still up to 20% after drying；
Second, total arid cycle is still longer, and first, second drying process for accounting for the time most absolutely arid cycle is all being held It is passed through continuously, discharges air, therefore inevitable air-borne dust pollution is to polytetrafluoroethyldispersion dispersion resin granular mass and stably The influence of property；
3rd, in the temperature that the 3rd process is kept, or even entirely the temperature of drying process all not less than 155-160 DEG C, is less than The boiling point of major impurity in material（Such as：Residual is than accounting for highest perfluoro caprylic acid boiling point as 189-191 DEG C）, it is difficult to reach except impurity elimination The purpose of matter, it is final to influence the quality index such as combinations color and lustre and smoothness；
In general, all there is slow drying speed, drying in existing polytetrafluoroethyldispersion dispersion resin particle drying technology or device Cycle is grown and the problems such as high energy consumption, and due to causing contamination of products using external air, in addition occur luming, fibrosis and The problems such as influenceing final product quality.
The content of the invention
It is contemplated that overcoming prior art insufficient, and propose a kind of polytetrafluoroethyldispersion dispersion resin particle wet feed and dry System and method.In the present invention, drying device, knot screen, low-temperature air-cooling device and airtight package device are defeated by guipure Send device to connect, form the circulation conveying loop of a tunnel type continuous processing, in order, effectively complete polytetrafluoroethylene (PTFE) and disperse Resin particle wet feed feeding, microwave drying, microwave superheat steam drying and removal of impurities, cooling and airtight package process, suitable for big Technical scale metaplasia is produced.
In order to realize above-mentioned technical purpose, following technical scheme is proposed：
A kind of polytetrafluoroethyldispersion dispersion resin particle wet feed drying system, including drying device, knot screen, low-temperature air-cooling device With airtight package device, drying device, knot screen, low-temperature air-cooling device and airtight package device pass sequentially through mesh-belt conveying dress Connection is put, net belt conveying apparatus includes live-roller and foraminous conveyer, and live-roller drives foraminous conveyer motion, and foraminous conveyer is successively Circulation conveying loop is formed through drying device, knot screen, low-temperature air-cooling device and airtight package device；
System feeding section is provided with front side of the drying device station, system feeding section is arranged on foraminous conveyer, and system feeding Feed conveying device is provided with above the station of section, feed conveying device is that drying system continuously inputs starting material；
System discharging section is provided with rear side of the low-temperature air-cooling device station, system discharging section is arranged on foraminous conveyer, and system Discharging section connects airtight package device, the dried material of airtight package device reception system output.
Further, drying device includes drying device body and is arranged on the microwave leakage energy of drying device body both sides Suppressor I and vertical shift gas plate I, microwave generator are connected with drying device body, drying device body upper end is provided with steam Arrange mouth；Drying device body includes metal shell, and metal shell includes stainless steel or aluminium material, and metal shell can prevent microwave from letting out Dew.
Further, knot screen includes knot screen body and is arranged on the microwave leakage energy of knot screen body both sides Suppressor II and vertical shift gas plate II, microwave generator is connected with knot screen body；Mesh plate is provided with knot screen body, Mesh plate includes mesh plate I and mesh plate II, and mesh plate I is arranged on knot screen bodies top, and mesh plate II is arranged on removal of impurities Device body bottom；Knot screen body upper end is provided with outlet housing, and outlet housing is provided with steam (vapor) outlet, knot screen body lower end Provided with air intake cover, air intake cover is provided with steam inlet；Knot screen body includes metal shell, metal shell include stainless steel or Aluminium material, metal shell can prevent microwave from leakage.
Further, the knot screen is connected with superheated steam EGR, superheated steam EGR one end and steam Outlet connection, the other end are connected with steam inlet；The superheated steam EGR includes steam purifier, steam circulation wind Machine and steam superheater, steam purifier, steam circulation blower fan pass sequentially through steam pipeline with steam superheater and connected, and Knot screen forms steam circulation by steam pipeline with steam purifier, steam circulation blower fan and steam superheater and closed Road.
Further, threeway I and threeway II, threeway I and three are provided between the steam circulation blower fan and steam superheater Logical II is arranged on steam pipeline, and threeway I is connected with air bleeding valve, and threeway II is connected with charge valve.
Further, the low-temperature air-cooling device includes low-temperature air-cooling device body and is arranged on low-temperature air-cooling device sheet The vertical shift gas plate III of body both sides, low-temperature air-cooling device body upper end are provided with air outlet, and lower end is provided with air inlet.
Further, the low-temperature air-cooling device is connected with cold air circulating apparatus, cold air circulating apparatus one end and air-out Mouth connection, the other end are connected with air inlet；The cold air circulating apparatus includes air cleaning unit, air circulation fans and sky Air cooling device, air cleaning unit, air circulation fans and air-cooling apparatus pass sequentially through air delivery pipe and connected, and low Warm air device for cooling forms cold air by air delivery pipe with air cleaning unit, air circulation fans and air-cooling apparatus and followed Ring is closed circuit.
Further, the airtight package device includes the shell of totally-enclosed property, and shell can be prevented effectively in packing device With extraneous gas exchanges occur for portion, and airtight package device has weighing, the function of packaging.
Further, the foraminous conveyer is polytetrafluoroethylfiberglass fiberglass material.
A kind of polytetrafluoroethyldispersion dispersion resin particle wet feed drying means, comprises the following steps：
A. feeding
Supplied polytetrafluoroethyldispersion dispersion resin particle wet feed as starting material by the use of feed conveying device, and uniformly entered to system On the foraminous conveyer for expecting section；
B. microwave drying
The starting material that step A is supplied is entered in drying device by foraminous conveyer, starting material is advanced in drying device 5-15min, while by microwave action 5-15min, the steam in starting material turns to vapor, is overflowed naturally from steam row's mouth, And starting material temperature≤100 DEG C during control drying, obtain material I；
C. microwave, high temperature super heated steam are dry and clean
The dried materials I of step B are passed in knot screen by foraminous conveyer, material I is advanced 10- in knot screen 25min, 10-25min is acted on by microwave and high temperature super heated steam, while temperature in knot screen is regulated and controled, control temperature For 200-250 DEG C, the aquation gas in material I is vapor, and the impurity in material I is gasified, and is drawn and is made in steam circulation blower fan Under, vapor is entered in outlet housing with the steam containing impurity by mesh plate I, then is gone out by the steam on outlet housing Mouth enters in superheated steam EGR；In superheated steam EGR, vapor and impure steam pass sequentially through steam Purifier, 120-160 DEG C is cooled to, removes the residual impurity mixed in material I, obtain superheated steam free from foreign meter, overheated Steam enters in steam superheater by steam circulation fan action, 200-250 DEG C is heated to be in steam superheater High temperature super heated steam, high temperature super heated steam are entered in air intake cover by steam inlet, then are diffused into removal of impurities by mesh plate II In device；In knot screen, high temperature super heated steam passes sequentially through foraminous conveyer, material I and mesh plate I with 0.1-2.0m/s, Finally by the steam (vapor) outlet on outlet housing, one cycle is completed；After persistent loop 10-25min, material I is warming up to 195-240 DEG C, obtain material II；
D. cool down
Material II after step C dryings and removal of impurities enters in low-temperature air-cooling device with foraminous conveyer, and material II is in low-temperature air-cooling Advance 10-25min in device, obtains material III；
In low-temperature air-cooling device, the air being discharged is entered in cold air circulating apparatus by air outlet；Followed in cold air In loop device, the air being discharged is filtered by air cleaning unit by air circulation fans draw, enters sky After being cooled down, removing water in air cooling device, -30--15 DEG C of clean cold dry airs are obtained, cold dry air is led to 0.1-2.0m/s Cross air inlet to enter in low-temperature air-cooling device, material II cooled down, while cold dry air is heated, after pass through air outlet It is discharged, completion one cycle, after persistent loop 10-25min, material II is cooled to 10-19 DEG C, obtains material III；
E. airtight package
Material III after step D coolings is transported in airtight package device with foraminous conveyer from system discharge end section, close In closure assembling device, weighing and the packaging of material III are completed.
After testing, draw：In step B, the moisture content of material I is 5-10%；In step C, the moisture content of material II is Less than 0.02%, removal of impurity is more than 99.5%；In D steps, the moisture content of material III is less than 0.02%.
Using the technical program, the advantageous effects brought are：
1）In the present invention, drying device, knot screen, low-temperature air-cooling device and airtight package device pass through net belt conveying apparatus Connection, the circulation conveying loop of a tunnel type continuous processing is formed, in order, effectively complete polytetrafluoroethyldispersion dispersion resin Grain wet feed drying process.It is low that the present invention can produce moisture（Moisture content is less than 0.02%）, impurity residual it is low（Clearance exists More than 99.5%）, without caking, the application performance such as high-quality polyflon discrete particles, tensile strength without fibrosis is higher by Traditional approach 5-10%, and effectively prevent the influence to environment；Meanwhile the dry materials cycle is short, drying system efficiency high, easily In the feedback control of automation, suitable for large-scale industrial production；
2）In step B of the present invention, due to high, the water in initial feed into the initial feed average moisture content in drying device Point can efficient absorption microwave, moisture content in initial feed can be down to 5-10% in 5-15min.It is continuous due to microwave action Caused vapor is limited by vertical shift gas plate I, without being overflowed from drying device both sides, steam shape in drying device Being overflowed naturally into pressure-fired, and from steam row's mouth, this unpowered and without the participation of other gases exhaust flow rate is low, flow is small, Material will not be caused to extrude and sheared, be also not in the phenomenon for bringing dust and contaminated material into by air；Meanwhile by normal pressure Water boiling point limits, and steam temperature is about 100 DEG C, and temperature of charge is not more than 100 DEG C, and this is far below material because of polymerisation And remaining additive boiling point and decomposition aerogenesis temperature, therefore, in stepb, in addition to water, the remaining addition of material polymerisation Thing will not gasify, and will not decomposition and inversion be gas, and caused steam is purer, does not contain the pollution of hostile environment Thing, directly it can discharge or use it for anything else；
3）In step C of the present invention, material I is advanced 10-25min in knot screen, while by superheated steam EGR Effect, it is less than 0.02% that can promote the moisture content of material II.High temperature super heated steam with 0.1-2.0m/s flow velocity from bottom to top successively Through foraminous conveyer, material I and mesh plate I, because high temperature super heated steam flow velocity is low, caused blast is small, without to thing Material I produces larger mechanical force, and high temperature super heated steam action direction and gravity direction are on the contrary, the particle of material I can be effectively reduced Between extruding and shearing, can effectively avoid material I from blocking and fibrosis occur.Realize that the energy follows using steam circulating device Ring is utilized, and the effectively save cost of energy, vapor is purified by steam purifier, is cooled to 120-160 DEG C, at such a temperature, Removing in polymerisation after remaining additive steam, vapor (steam) temperature is still higher, will not condense, avoid the latent heat of vaporization from being wasted, During by steam superheating stove heat, the required energy consumption that heats up is relatively low.Because superheated steam specific heat at constant pressure is larger, need to only lead to Larger drying efficiency can just be produced by entering a small amount of high temperature super heated steam, and high temperature super heated steam is on the one hand and microwave action, quickening are surplus Remaining moisture vaporization, on the other hand can make material and ambient temperature be quickly raised to more than 100 DEG C, prevent the water cooling just vaporized It is solidifying, and it is taken out of to dry knot screen in the lump；Meanwhile high temperature super heated steam temperature is passed through as 200-250 DEG C, by I liter of material For temperature to 195-240 DEG C, this exceedes dispersant perfluoro caprylic acid boiling point or perfluorooctanoic acid decomposition temperature in polytetrafluoroethylene (PTFE)（≥ 130℃）, can make dispersant perfluoro caprylic acid be gasified totally and and feed separation, perfluoro caprylic acid be gasified totally after with superheated steam band Go out dry knot screen, can effectively avoid occurring perfluoro caprylic acid residual in dry materials finished product；
4）In D steps of the present invention, material II is advanced 10-25min in knot screen, while is made by cold air circulating apparatus With the moisture content of material III can be promoted to maintain less than 0.02%.In low-temperature air-cooling device, cold dry air is flowed with 0.1-2.0m/s Speed is entered in low-temperature air-cooling device by air inlet, then bottom-up diffusion, cold dry air cool down to material II, due to Cold dry air flow velocity is low, and caused blast is small, without producing larger mechanical force, and cold dry air effect side to material II To gravity direction on the contrary, the extruding and shearing between the particle of material II can be effectively reduced, material II can be effectively avoided to tie Block and fibrosis.When material II is cooled into 10-19 DEG C, polytetrafluoroethyldispersion dispersion resin particle can be effectively improved to extruding The tolerance level of power and shearing force, and effectively avoid when subsequent step E is packed, material III occurs luming and fibrosis.In step D In, although being used to cool down material using air as medium, air is not contaminated in EGR, and is provided with purification of air Therefore device, can make circulation air keep clean, without contaminated material as precautionary measures；Material II is cooled to 10- At 19 DEG C, the temperature of material II is relatively low, then in the case where air humidity is higher, condensed water phenomenon easily occurs for the surface of material II, because This uses hermetically sealed shell in follow-up packing device, completes packaging, can prevent that dry materials finished product moisture content is impacted；
5）In the present invention, knot screen need to pass through threeway II and charge valve to superheated steam EGR before bringing into operation Clean superheated steam is filled with, is used for microwave drying, microwave superheat steam drying and removal of impurities.In step C, due in material I Moisture continued vaporization, there is increment, can pass through threeway I in the steam that can make to dry in knot screen and superheated steam EGR And air bleeding valve discharges increment steam, maintain the circulatory system stable, further, since steam before discharge by steam purifier Purification, without adverse environmental pollutants, directly can discharge or use it for anything else；
6）In step B, C, D of the present invention, dry, cooling material time is all shorter, and it is 5-15min to complete the step B times, complete Be 10-25min into the step C times, complete the step D times be 10-25min, wherein, arid cycle 15-40min, drying and Cooling cycle is 25-65min, greatly shortens the dry materials cooling process-cycle, and further reduces material and processing During caking, fibrosis and contaminated probability occurs.
Brief description of the drawings
Fig. 1 is drying system structural representation in the present invention
In figure, 1, drying device, 101, drying device body, 102, microwave leakage can suppressor I, 103, vertical shift gas plate I, 104, Steam arranges mouth, 2, knot screen, 201, knot screen body, 202, microwave leakage can suppressor II, 203, vertical shift gas plate II, 204th, mesh plate I, 205, mesh plate II, 3, low-temperature air-cooling device, 301, low-temperature air-cooling device body, 302, vertical shift gas plate III, 303, air outlet, 304, air inlet, 4, airtight package device, 5, net belt conveying apparatus, 501, live-roller, 502, transmission net Band, 6, system feeding section, 7, feed conveying device, 8, system discharging section, 9, microwave generator, 10, outlet housing, 11, steam goes out Mouthful, 12, air intake cover, 13, steam inlet, 14, superheated steam EGR, 1401, steam purifier, 1402, steam circulation Blower fan, 1403, steam superheater, 1404, steam pipeline, 1405, threeway I, 1406, threeway II, 15, air bleeding valve, 16, inflation Valve, 17, cold air circulating apparatus, 1701, air cleaning unit, 1702, air circulation fans, 1703, air-cooling apparatus, 1704th, air delivery pipe.
Embodiment
It is clearly and completely described below by the technical scheme in the embodiment of the present invention, it is clear that described reality Apply the part of the embodiment that example is only the present invention, rather than whole embodiments.It is general based on the embodiment in the present invention, this area All other embodiment that logical technical staff is obtained under the premise of creative work is not made, belong to what the present invention protected Scope.
Embodiment 1
A kind of polytetrafluoroethyldispersion dispersion resin particle wet feed drying system, including drying device 1, knot screen 2, low-temperature air-cooling dress 3 and airtight package device 4 are put, drying device 1, knot screen 2, low-temperature air-cooling device 3 and airtight package device 4 pass sequentially through net Band conveying device 5 connects, and net belt conveying apparatus 5 includes live-roller 501 and foraminous conveyer 502, and live-roller 501 drives foraminous conveyer 502 motions, and foraminous conveyer 502 sequentially passes through drying device 1, knot screen 2, low-temperature air-cooling device 3 and airtight package device 4 And form circulation conveying loop；System feeding section 6 is provided with front side of the station of drying device 1, system feeding section 6 is arranged on conveying On guipure 502, and feed conveying device 7 is provided with above the station of system feeding section 6, feed conveying device 7 connects for drying system Continuous input starting material；System discharging section 8 is provided with rear side of the station of low-temperature air-cooling device 3, system discharging section 8 is arranged on conveying On guipure 502, and system discharging section 8 connects airtight package device 4, the dried material of the reception system of airtight package device 4 output.
Further, drying device 1 includes drying device body 101 and is arranged on the both sides of drying device body 101 Microwave leaks energy suppressor I 102 and vertical shift gas plate I 103, and microwave generator 9 is connected with drying device body 101, dries dress The upper end of body 101 is put provided with steam row's mouth 104；Drying device body 101 includes metal shell, metal shell include stainless steel or Aluminium material, metal shell can prevent microwave from leakage.
Further, knot screen 2 includes knot screen body 201 and is arranged on the both sides of knot screen body 201 Microwave leaks energy suppressor II 202 and vertical shift gas plate II 203, and microwave generator 9 is connected with knot screen body 201；Removal of impurities dress Put in body 201 and be provided with mesh plate, mesh plate includes mesh plate I 204 and mesh plate II 205, and mesh plate I 204 is arranged on removal of impurities The top of device body 201, mesh plate II 205 are arranged on the bottom of knot screen body 201；The upper end of knot screen body 201 is provided with Outlet housing 10, outlet housing 10 are provided with steam (vapor) outlet 11, and the lower end of knot screen body 201 is provided with air intake cover 12, on air intake cover 12 Provided with steam inlet 13；Knot screen body 201 includes metal shell, and metal shell includes stainless steel or aluminium material, metal-back Body can prevent microwave from leakage.
Further, the knot screen 2 is connected with superheated steam EGR 14, the one end of superheated steam EGR 14 with Steam (vapor) outlet 11 is connected, and the other end is connected with steam inlet 13；The superheated steam EGR 14 includes steam purifier 1401st, steam circulation blower fan 1402 and steam superheater 1403, steam purifier 1401, steam circulation blower fan 1402 and steam Superheater 1403 passes sequentially through steam pipeline 1404 and connected, and knot screen 2 and steam purifier 1401, steam circulation wind Machine 1402 and steam superheater 1403 are closed circuit by the formation of steam pipeline 1404 steam circulation.
Further, the low-temperature air-cooling device 3 includes low-temperature air-cooling device body 301 and is arranged on low-temperature air-cooling dress The vertical shift gas plate III 302 of the both sides of body 301 is put, the upper end of low-temperature air-cooling device body 301 is provided with air outlet 303, and lower end is provided with Air inlet 304.
Further, the low-temperature air-cooling device 3 is connected with cold air circulating apparatus 17, the one end of cold air circulating apparatus 17 with Air outlet 303 is connected, and the other end is connected with air inlet 304；The cold air circulating apparatus 17 include air cleaning unit 1701, Air circulation fans 1702 and air-cooling apparatus 1703, air cleaning unit 1701, air circulation fans 1702 and air are cold But device 1703 passes sequentially through air delivery pipe 1704 and connected, and low-temperature air-cooling device 3 follows with air cleaning unit 1701, air Ring blower fan 1702 and air-cooling apparatus 1703 are circulated closed circuit by the formation cold air of air delivery pipe 1704.
Further, the airtight package device 4 includes the shell of totally-enclosed property, and shell can be prevented effectively in packing device With extraneous gas exchanges occur for portion, and airtight package device 4 has weighing, the function of packaging.
A kind of polytetrafluoroethyldispersion dispersion resin particle wet feed drying means, comprises the following steps：
A. feeding
The polytetrafluoroethyldispersion dispersion resin particle wet feed that moisture content is 50% is supplied as starting material by the use of feed conveying device 7, And uniformly on the foraminous conveyer 502 of system feeding section 6；
B. microwave drying
The starting material that step A is supplied is entered in drying device 1 by foraminous conveyer 502, starting material is in drying device 1 Traveling 5min, while by microwave action 5min, the steam in starting material turns to vapor, is overflowed naturally from steam row's mouth 104, And 90 DEG C of starting material temperature during control drying, obtain material I；
C. microwave, high temperature super heated steam are dry and clean
The dried materials I of step B are passed in knot screen 2 by foraminous conveyer 502, material I is advanced in knot screen 2 10min, 10min is acted on by microwave and high temperature super heated steam, while temperature in knot screen 2 is regulated and controled, control the temperature to be 200 DEG C, the aquation gas in material I is vapor, and the impurity in material I is gasified, in the draw of steam circulation blower fan 1402 Under, vapor is entered in outlet housing 10 with the steam containing impurity by mesh plate I 204, then by outlet housing 10 Steam (vapor) outlet 11 enters in superheated steam EGR 14；In superheated steam EGR 14, vapor and impure steam Steam purifier 1401 is passed sequentially through, is cooled to 120 DEG C, the residual impurity mixed in material I is removed, obtains mistake free from foreign meter Vapours, superheated steam are acted on by steam circulation blower fan 1402, are entered in steam superheater 1403, in steam superheater 200 DEG C of high temperature super heated steam is heated to be in 1403, high temperature super heated steam is entered in air intake cover 12 by steam inlet 13, It is diffused into again by mesh plate II 205 in knot screen 2；In knot screen 2, high temperature super heated steam is passed sequentially through with 0.1m/s Foraminous conveyer 502, material I and mesh plate I 204, finally by the steam (vapor) outlet 11 on outlet housing 10, one cycle is completed, is held After continuous circulation 10min, material I is warming up to 195 DEG C, obtains material II；
D. cool down
Material II after step C dryings and removal of impurities enters in low-temperature air-cooling device 3 with foraminous conveyer 502, and material II is in low temperature Advance 10min in air cooling equipment 3, obtains material III；
In low-temperature air-cooling device 3, the air being discharged is entered in cold air circulating apparatus 17 by air outlet 303；Cold In air circulation device 17, the air being discharged is passed through air cleaning unit by the draw of air circulation fans 1702 1701 are filtered, and are entered in air-cooling apparatus 1703 after being cooled down, removing water, are obtained -30 DEG C of clean cold dry airs, dry and cold Air is entered in low-temperature air-cooling device 3 with 0.1m/s by air inlet 304, and material II is cooled down, while cold dry air Be heated, after be discharged by air outlet 303, complete one cycle, after persistent loop 10min, material II is cooled to 10 DEG C, Obtain material III；
E. airtight package
Material III after step D coolings is transported in airtight package device 4 with foraminous conveyer 502 from system discharge end section, In airtight package device 4, weighing and the packaging of material III are completed.
After testing, draw：In step B, the moisture content of material I is 10%；In step C, the moisture content of material II is 0.02%, Removal of impurity is 99.5%；In D steps, the moisture content of material III is 0.02%.
Embodiment 2
A kind of polytetrafluoroethyldispersion dispersion resin particle wet feed drying system, including drying device 1, knot screen 2, low-temperature air-cooling dress 3 and airtight package device 4 are put, drying device 1, knot screen 2, low-temperature air-cooling device 3 and airtight package device 4 pass sequentially through net Band conveying device 5 connects, and net belt conveying apparatus 5 includes live-roller 501 and foraminous conveyer 502, and live-roller 501 drives foraminous conveyer 502 motions, and foraminous conveyer 502 sequentially passes through drying device 1, knot screen 2, low-temperature air-cooling device 3 and airtight package device 4 And form circulation conveying loop；System feeding section 6 is provided with front side of the station of drying device 1, system feeding section 6 is arranged on conveying On guipure 502, and feed conveying device 7 is provided with above the station of system feeding section 6, feed conveying device 7 connects for drying system Continuous input starting material；System discharging section 8 is provided with rear side of the station of low-temperature air-cooling device 3, system discharging section 8 is arranged on conveying On guipure 502, and system discharging section 8 connects airtight package device 4, the dried material of the reception system of airtight package device 4 output.
Further, drying device 1 includes drying device body 101 and is arranged on the both sides of drying device body 101 Microwave leaks energy suppressor I 102 and vertical shift gas plate I 103, and microwave generator 9 is connected with drying device body 101, dries dress The upper end of body 101 is put provided with steam row's mouth 104；Drying device body 101 includes metal shell, metal shell include stainless steel or Aluminium material, metal shell can prevent microwave from leakage.
Further, knot screen 2 includes knot screen body 201 and is arranged on the both sides of knot screen body 201 Microwave leaks energy suppressor II 202 and vertical shift gas plate II 203, and microwave generator 9 is connected with knot screen body 201；Removal of impurities dress Put in body 201 and be provided with mesh plate, mesh plate includes mesh plate I 204 and mesh plate II 205, and mesh plate I 204 is arranged on removal of impurities The top of device body 201, mesh plate II 205 are arranged on the bottom of knot screen body 201；The upper end of knot screen body 201 is provided with Outlet housing 10, outlet housing 10 are provided with steam (vapor) outlet 11, and the lower end of knot screen body 201 is provided with air intake cover 12, on air intake cover 12 Provided with steam inlet 13；Knot screen body 201 includes metal shell, and metal shell includes stainless steel or aluminium material, metal-back Body can prevent microwave from leakage.
Further, the knot screen 2 is connected with superheated steam EGR 14, the one end of superheated steam EGR 14 with Steam (vapor) outlet 11 is connected, and the other end is connected with steam inlet 13；The superheated steam EGR 14 includes steam purifier 1401st, steam circulation blower fan 1402 and steam superheater 1403, steam purifier 1401, steam circulation blower fan 1402 and steam Superheater 1403 passes sequentially through steam pipeline 1404 and connected, and knot screen 2 and steam purifier 1401, steam circulation wind Machine 1402 and steam superheater 1403 are closed circuit by the formation of steam pipeline 1404 steam circulation.
Further, threeway I 1405 and threeway are provided between the steam circulation blower fan 1402 and steam superheater 1403 II 1406, threeway I 1405 and threeway II 1406 are arranged on steam pipeline 1404, and threeway I 1405 is connected with air bleeding valve 15, Threeway II 1406 is connected with charge valve 16.
Further, the low-temperature air-cooling device 3 includes low-temperature air-cooling device body 301 and is arranged on low-temperature air-cooling dress The vertical shift gas plate III 302 of the both sides of body 301 is put, the upper end of low-temperature air-cooling device body 301 is provided with air outlet 303, and lower end is provided with Air inlet 304.
Further, the low-temperature air-cooling device 3 is connected with cold air circulating apparatus 17, the one end of cold air circulating apparatus 17 with Air outlet 303 is connected, and the other end is connected with air inlet 304；The cold air circulating apparatus 17 include air cleaning unit 1701, Air circulation fans 1702 and air-cooling apparatus 1703, air cleaning unit 1701, air circulation fans 1702 and air are cold But device 1703 passes sequentially through air delivery pipe 1704 and connected, and low-temperature air-cooling device 3 follows with air cleaning unit 1701, air Ring blower fan 1702 and air-cooling apparatus 1703 are circulated closed circuit by the formation cold air of air delivery pipe 1704.
A kind of polytetrafluoroethyldispersion dispersion resin particle wet feed drying means, comprises the following steps：
A. feeding
The polytetrafluoroethyldispersion dispersion resin particle wet feed that moisture content is 45% is supplied as starting material by the use of feed conveying device 7, And uniformly on the foraminous conveyer 502 of system feeding section 6；
B. microwave drying
The starting material that step A is supplied is entered in drying device 1 by foraminous conveyer 502, starting material is in drying device 1 Traveling 15min, while by microwave action 15min, the steam in starting material turns to vapor, it is naturally excessive from steam row mouth 104 Go out, and control 100 DEG C of starting material temperature during drying, obtain material I；
C. microwave, high temperature super heated steam are dry and clean
The dried materials I of step B are passed in knot screen 2 by foraminous conveyer 502, material I is advanced in knot screen 2 25min, 25min is acted on by microwave and high temperature super heated steam, while temperature in knot screen 2 is regulated and controled, control the temperature to be 250 DEG C, the aquation gas in material I is vapor, and the impurity in material I is gasified, in the draw of steam circulation blower fan 1402 Under, vapor is entered in outlet housing 10 with the steam containing impurity by mesh plate I 204, then by outlet housing 10 Steam (vapor) outlet 11 enters in superheated steam EGR 14；In superheated steam EGR 14, vapor and impure steam Steam purifier 1401 is passed sequentially through, is cooled to 160 DEG C, the residual impurity mixed in material I is removed, obtains mistake free from foreign meter Vapours, superheated steam are acted on by steam circulation blower fan 1402, are entered in steam superheater 1403, in steam superheater 250 DEG C of high temperature super heated steam is heated to be in 1403, high temperature super heated steam is entered in air intake cover 12 by steam inlet 13, It is diffused into again by mesh plate II 205 in knot screen 2；In knot screen 2, high temperature super heated steam is passed sequentially through with 2.0m/s Foraminous conveyer 502, material I and mesh plate I 204, finally by the steam (vapor) outlet 11 on outlet housing 10, one cycle is completed, is held After continuous circulation 25min, material I is warming up to 240 DEG C, obtains material II；
D. cool down
Material II after step C dryings and removal of impurities enters in low-temperature air-cooling device 3 with foraminous conveyer 502, and material II is in low temperature Advance 25min in air cooling equipment 3, obtains material III；
In low-temperature air-cooling device 3, the air being discharged is entered in cold air circulating apparatus 17 by air outlet 303；Cold In air circulation device 17, the air being discharged is passed through air cleaning unit by the draw of air circulation fans 1702 1701 are filtered, and are entered in air-cooling apparatus 1703 after being cooled down, removing water, are obtained -15 DEG C of clean cold dry airs, dry and cold Air is entered in low-temperature air-cooling device 3 with 2.0m/s by air inlet 304, and material II is cooled down, while cold dry air Be heated, after be discharged by air outlet 303, complete one cycle, after persistent loop 25min, material II is cooled to 19 DEG C, Obtain material III；
E. airtight package
Material III after step D coolings is transported in airtight package device 4 with foraminous conveyer 502 from system discharge end section, In airtight package device 4, weighing and the packaging of material III are completed.
After testing, draw：In step B, the moisture content of material I is 5%；In step C, the moisture content of material II is 0.007%, Removal of impurity is 99.8%；In D steps, the moisture content of material III is 0.006%.
Embodiment 3
As shown in Figure 1：A kind of polytetrafluoroethyldispersion dispersion resin particle wet feed drying system, including drying device 1, knot screen 2, Low-temperature air-cooling device 3 and airtight package device 4, dry fill 1 put, knot screen 2, low-temperature air-cooling device 3 and airtight package device 4 Pass sequentially through net belt conveying apparatus 5 to connect, net belt conveying apparatus 5 includes live-roller 501 and foraminous conveyer 502, the band of live-roller 501 Dynamic foraminous conveyer 502 moves, and foraminous conveyer 502 sequentially passes through drying device 1, knot screen 2, low-temperature air-cooling device 3 and close Closure assembling device 4 and form circulation conveying loop；System feeding section 6, system feeding section are provided with front side of the station of drying device 1 6 are arranged on foraminous conveyer 502, and are provided with feed conveying device 7 above the station of system feeding section 6, and feed conveying device 7 is Drying system continuously inputs starting material；System discharging section 8, system discharging section 8 are provided with rear side of the station of low-temperature air-cooling device 3 It is arranged on foraminous conveyer 502, and system discharging section 8 connects airtight package device 4, the output of the reception system of airtight package device 4 Dried material.
Further, drying device 1 includes drying device body 101 and is arranged on the both sides of drying device body 101 Microwave leaks energy suppressor I 102 and vertical shift gas plate I 103, and microwave generator 9 is connected with drying device body 101, dries dress The upper end of body 101 is put provided with steam row's mouth 104；Drying device body 101 includes metal shell, metal shell include stainless steel or Aluminium material, metal shell can prevent microwave from leakage.
Further, knot screen 2 includes knot screen body 201 and is arranged on the both sides of knot screen body 201 Microwave leaks energy suppressor II 202 and vertical shift gas plate II 203, and microwave generator 9 is connected with knot screen body 201；Removal of impurities dress Put in body 201 and be provided with mesh plate, mesh plate includes mesh plate I 204 and mesh plate II 205, and mesh plate I 204 is arranged on removal of impurities The top of device body 201, mesh plate II 205 are arranged on the bottom of knot screen body 201；The upper end of knot screen body 201 is provided with Outlet housing 10, outlet housing 10 are provided with steam (vapor) outlet 11, and the lower end of knot screen body 201 is provided with air intake cover 12, on air intake cover 12 Provided with steam inlet 13；Knot screen body 201 includes metal shell, and metal shell includes stainless steel or aluminium material, metal-back Body can prevent microwave from leakage.
Further, the knot screen 2 is connected with superheated steam EGR 14, the one end of superheated steam EGR 14 with Steam (vapor) outlet 11 is connected, and the other end is connected with steam inlet 13；The superheated steam EGR 14 includes steam purifier 1401st, steam circulation blower fan 1402 and steam superheater 1403, steam purifier 1401, steam circulation blower fan 1402 and steam Superheater 1403 passes sequentially through steam pipeline 1404 and connected, and knot screen and 2 steam purifiers 1401, steam circulation wind Machine 1402 and steam superheater 1403 are closed circuit by the formation of steam pipeline 1404 steam circulation.
Further, threeway I 1405 and threeway are provided between the steam circulation blower fan 1402 and steam superheater 1403 II 1406, threeway I 1405 and threeway II 1406 are arranged on steam pipeline 1404, and threeway I 1405 is connected with air bleeding valve 15, Threeway II 1406 is connected with charge valve 16.
Further, the low-temperature air-cooling device 3 includes low-temperature air-cooling device body 301 and is arranged on low-temperature air-cooling dress The vertical shift gas plate III 302 of the both sides of body 301 is put, the upper end of low-temperature air-cooling device body 301 is provided with air outlet 303, and lower end is provided with Air inlet 304.
Further, the low-temperature air-cooling device 3 is connected with cold air circulating apparatus 17, the one end of cold air circulating apparatus 17 with Air outlet 303 is connected, and the other end is connected with air inlet 304；The cold air circulating apparatus 17 include air cleaning unit 1701, Air circulation fans 1702 and air-cooling apparatus 1703, air cleaning unit 1701, air circulation fans 1702 and air are cold But device 1703 passes sequentially through air delivery pipe 1704 and connected, and low-temperature air-cooling device 3 follows with air cleaning unit 1701, air Ring blower fan 1702 and air-cooling apparatus 1703 are circulated closed circuit by the formation cold air of air delivery pipe 1704.
Further, the airtight package device 4 includes the shell of totally-enclosed property, and shell can be prevented effectively in packing device With extraneous gas exchanges occur for portion, and airtight package device 4 has weighing, the function of packaging.
Further, the foraminous conveyer 502 is polytetrafluoroethylfiberglass fiberglass material.
A kind of polytetrafluoroethyldispersion dispersion resin particle wet feed drying means, comprises the following steps：
A. feeding
The polytetrafluoroethyldispersion dispersion resin particle wet feed that moisture content is 40% is supplied as starting material by the use of feed conveying device 7, And uniformly on the foraminous conveyer 502 of system feeding section 6；
B. microwave drying
The starting material that step A is supplied is entered in drying device 1 by foraminous conveyer 502, starting material is in drying device 1 Traveling 10min, while by microwave action 10min, the steam in starting material turns to vapor, it is naturally excessive from steam row mouth 104 Go out, and control 97 DEG C of starting material temperature during drying, obtain material I；
C. microwave, high temperature super heated steam are dry and clean
The dried materials I of step B are passed in knot screen 2 by foraminous conveyer 502, material I is advanced in knot screen 2 18min, 18min is acted on by microwave and high temperature super heated steam, while temperature in knot screen 2 is regulated and controled, control the temperature to be 230 DEG C, the aquation gas in material I is vapor, and the impurity in material I is gasified, in the draw of steam circulation blower fan 1402 Under, vapor is entered in outlet housing 10 with the steam containing impurity by mesh plate I 204, then by outlet housing 10 Steam (vapor) outlet 11 enters in superheated steam EGR 14；In superheated steam EGR 14, vapor and impure steam Steam purifier 1401 is passed sequentially through, is cooled to 140 DEG C, the residual impurity mixed in material I is removed, obtains mistake free from foreign meter Vapours, superheated steam are acted on by steam circulation blower fan 1402, are entered in steam superheater 1403, in steam superheater 230 DEG C of high temperature super heated steam is heated to be in 1403, high temperature super heated steam is entered in air intake cover 12 by steam inlet 13, It is diffused into again by mesh plate II 205 in knot screen 2；In knot screen 2, high temperature super heated steam is led to successively with 0.15m/s Foraminous conveyer 502, material I and mesh plate I 204 are crossed, finally by the steam (vapor) outlet 11 on outlet housing 10, completes one cycle, After persistent loop 18min, material I is warming up to 225 DEG C, obtains material II；
D. cool down
Material II after step C dryings and removal of impurities enters in low-temperature air-cooling device 3 with foraminous conveyer 502, and material II is in low temperature Advance 18min in air cooling equipment 3, obtains material III；
In low-temperature air-cooling device 3, the air being discharged is entered in cold air circulating apparatus 17 by air outlet 303；Cold In air circulation device 17, the air being discharged is passed through air cleaning unit by the draw of air circulation fans 1702 1701 are filtered, and are entered in air-cooling apparatus 1703 after being cooled down, removing water, are obtained -22 DEG C of clean cold dry airs, dry and cold Air is entered in low-temperature air-cooling device 3 with 0.15m/s by air inlet 304, and material II is cooled down, while cold dry air Be heated, after be discharged by air outlet 303, complete one cycle, after persistent loop 18min, material II is cooled to 14 DEG C, Obtain material III；
E. airtight package
Material III after step D coolings is transported in airtight package device 4 with foraminous conveyer 502 from system discharge end section, In airtight package device 4, weighing and the packaging of material III are completed.
After testing, draw：In step B, the moisture content of material I is 7%；In step C, the moisture content of material II is 0.015%, Removal of impurity is 99.6%；In D steps, the moisture content of material III is 0.014%.
Embodiment 4
The polytetrafluoroethyldispersion dispersion resin particle wet feed for being 40% using 10kg moisture content is dried as raw material, and specific steps are such as Under：
A. feeding
Supplied polytetrafluoroethyldispersion dispersion resin particle wet feed 10kg as starting material by the use of feed conveying device 7, and uniformly arrived On the foraminous conveyer 502 of system feeding section 6；
B. microwave drying
The 10kg starting materials that step A is supplied are entered in drying device 1 by foraminous conveyer 502, starting material is drying dress Advance 10min in putting 1, while by microwave action 10min, the steam in starting material turns to vapor, from steam row's mouth 104 from So overflow, and control dry during 97 DEG C of starting material temperature, obtain the 6.5kg of material I, and the moisture content of material I is 7%；
C. microwave, high temperature super heated steam are dry and clean
The dried 6.5kg materials I of step B are passed in knot screen 2 by foraminous conveyer 502, material I is in knot screen 2 Middle traveling 18min, 18min is acted on by microwave and high temperature super heated steam, while temperature in knot screen 2 is regulated and controled, controlled Temperature is 230 DEG C, and the aquation gas in material I is vapor, and the impurity in material I is gasified, and is led in steam circulation blower fan 1402 Draw under effect, vapor is entered in outlet housing 10 with the steam containing impurity by mesh plate I 204, then passes through outlet housing Steam (vapor) outlet 11 on 10 enters in superheated steam EGR 14；In superheated steam EGR 14, vapor and containing miscellaneous Matter steam passes sequentially through steam purifier 1401, is cooled to 140 DEG C, removes the residual impurity mixed in material I, obtains without miscellaneous The superheated steam of matter, superheated steam are acted on by steam circulation blower fan 1402, are entered in steam superheater 1403, in steam mistake 230 DEG C of high temperature super heated steam is heated to be in hot stove 1403, high temperature super heated steam enters air intake cover by steam inlet 13 In 12, then it is diffused into knot screen 2 by mesh plate II 205；In knot screen 2, high temperature super heated steam with 0.15m/s according to It is secondary by foraminous conveyer 502, material I and mesh plate I 204, finally by the steam (vapor) outlet 11 on outlet housing 10, completion once follows Ring, after persistent loop 18min, material I is warming up to 225 DEG C, obtains the 6kg of material II, and the moisture content of material II is 0.016%, and impurity removes Rate is 99.5%；
D. cool down
6kg materials II after step C dryings and removal of impurities enter in low-temperature air-cooling device 3 with foraminous conveyer 502, and material II is low Advance 18min in warm air device for cooling 3, obtains the 6kg of material III, and the moisture content of material III is 0.015%；
In low-temperature air-cooling device 3, the air being discharged is entered in cold air circulating apparatus 17 by air outlet 303；Cold In air circulation device 17, the air being discharged is passed through air cleaning unit by the draw of air circulation fans 1702 1701 are filtered, and are entered in air-cooling apparatus 1703 after being cooled down, removing water, are obtained -22 DEG C of clean cold dry airs, dry and cold Air is entered in low-temperature air-cooling device 3 with 0.15m/s by air inlet 304, and material II is cooled down, while cold dry air Be heated, after be discharged by air outlet 303, complete one cycle, after persistent loop 18min, material II is cooled to 14 DEG C, Obtain material III；
E. airtight package
6kg materials III after step D coolings are transported to airtight package device 4 with foraminous conveyer 502 from system discharge end section It is interior, in airtight package device 4, complete weighing and the packaging of material III.
Embodiment 5
The polytetrafluoroethyldispersion dispersion resin particle wet feed for being 45% using 20kg moisture content is dried as raw material, and specific steps are such as Under：
A. feeding
Supplied polytetrafluoroethyldispersion dispersion resin particle wet feed 20kg as starting material by the use of feed conveying device 7, and uniformly arrived On the foraminous conveyer 502 of system feeding section 6；
B. microwave drying
The 20kg starting materials that step A is supplied are entered in drying device 1 by foraminous conveyer 502, starting material is drying dress Advance 15min in putting 1, while by microwave action 15min, the steam in starting material turns to vapor, from steam row's mouth 104 from So overflow, and control dry during 100 DEG C of starting material temperature, obtain the 10.5kg of material I, and the moisture content of material I is 5%；
C. microwave, high temperature super heated steam are dry and clean
The dried 10.5kg of material I of step B are passed in knot screen 2 by foraminous conveyer 502, material I is in knot screen 2 Middle traveling 25min, 25min is acted on by microwave and high temperature super heated steam, while temperature in knot screen 2 is regulated and controled, controlled Temperature is 250 DEG C, and the aquation gas in material I is vapor, and the impurity in material I is gasified, and is led in steam circulation blower fan 1402 Draw under effect, vapor is entered in outlet housing 10 with the steam containing impurity by mesh plate I 204, then passes through outlet housing Steam (vapor) outlet 11 on 10 enters in superheated steam EGR 14；In superheated steam EGR 14, vapor and containing miscellaneous Matter steam passes sequentially through steam purifier 1401, is cooled to 160 DEG C, removes the residual impurity mixed in material I, obtains without miscellaneous The superheated steam of matter, superheated steam are acted on by steam circulation blower fan 1402, are entered in steam superheater 1403, in steam mistake 250 DEG C of high temperature super heated steam is heated to be in hot stove 1403, high temperature super heated steam enters air intake cover by steam inlet 13 In 12, then it is diffused into knot screen 2 by mesh plate II 205；In knot screen 2, high temperature super heated steam with 2.0m/s according to It is secondary by foraminous conveyer 502, material I and mesh plate I 204, finally by the steam (vapor) outlet 11 on outlet housing 10, completion once follows Ring, after persistent loop 25min, material I is warming up to 240 DEG C, obtains the 10kg of material II, and the moisture content of material II is 0.007%, and impurity is gone Except rate is 99.8%
D. cool down
10kg after step C dryings and removal of impurities, material II enter in low-temperature air-cooling device 3 with foraminous conveyer 502, and material II exists Advance 25min in low-temperature air-cooling device 3, obtains the 10kg of material III, and the moisture content of material III is 0.006%；
In low-temperature air-cooling device 3, the air being discharged is entered in cold air circulating apparatus 17 by air outlet 303；Cold In air circulation device 17, the air being discharged is passed through air cleaning unit by the draw of air circulation fans 1702 1701 are filtered, and are entered in air-cooling apparatus 1703 after being cooled down, removing water, are obtained -15 DEG C of clean cold dry airs, dry and cold Air is entered in low-temperature air-cooling device 3 with 2.0m/s by air inlet 304, and material II is cooled down, while cold dry air Be heated, after be discharged by air outlet 303, complete one cycle, after persistent loop 25min, material II is cooled to 19 DEG C, Obtain material III；
E. airtight package
10kg materials III after step D coolings are transported to airtight package device 4 with foraminous conveyer 502 from system discharge end section It is interior, in airtight package device 4, complete weighing and the packaging of material III.
Embodiment 6
The polytetrafluoroethyldispersion dispersion resin particle wet feed for being 50% using 50kg moisture content is dried as raw material, and specific steps are such as Under：
A. feeding
Supplied polytetrafluoroethyldispersion dispersion resin particle wet feed 50kg as starting material by the use of feed conveying device 7, and uniformly arrived On the foraminous conveyer 502 of system feeding section 6；
B. microwave drying
The 50kg starting materials that step A is supplied are entered in drying device 1 by foraminous conveyer 502, starting material is drying dress Advance 5min in putting 1, while by microwave action 5min, the steam in starting material turns to vapor, natural from steam row mouth 104 Overflow, and control 90 DEG C of starting material temperature during drying, obtain the 27.7kg of material I, and the moisture content of material I is 10%；
C. microwave, high temperature super heated steam are dry and clean
The dried 27.7kg materials I of step B are passed in knot screen 2 by foraminous conveyer 502, material I is in knot screen 2 Middle traveling 10min, 10min is acted on by microwave and high temperature super heated steam, while temperature in knot screen 2 is regulated and controled, controlled Temperature is 200 DEG C, and the aquation gas in material I is vapor, and the impurity in material I is gasified, and is led in steam circulation blower fan 1402 Draw under effect, vapor is entered in outlet housing 10 with the steam containing impurity by mesh plate I 204, then passes through outlet housing Steam (vapor) outlet 11 on 10 enters in superheated steam EGR 14；In superheated steam EGR 14, vapor and containing miscellaneous Matter steam passes sequentially through steam purifier 1401, is cooled to 120 DEG C, removes the residual impurity mixed in material I, obtains without miscellaneous The superheated steam of matter, superheated steam are acted on by steam circulation blower fan 1402, are entered in steam superheater 1403, in steam mistake 200 DEG C of high temperature super heated steam is heated to be in hot stove 1403, high temperature super heated steam enters air intake cover by steam inlet 13 In 12, then it is diffused into knot screen 2 by mesh plate II 205；In knot screen 2, high temperature super heated steam with 0.1m/s according to It is secondary by foraminous conveyer 502, material I and mesh plate I 204, finally by the steam (vapor) outlet 11 on outlet housing 10, completion once follows Ring, after persistent loop 10min, material I is warming up to 195 DEG C, obtains the 25kg of material II, and the moisture content of material II is 0.02%, and impurity removes Rate is 99.5%；
D. cool down
25kg materials II after step C dryings and removal of impurities enter in low-temperature air-cooling device 3 with foraminous conveyer 502, and material II exists Advance 10min in low-temperature air-cooling device 3, obtains the 25kg of material III, and the moisture content of material III is 0.02%；
In low-temperature air-cooling device 3, the air being discharged is entered in cold air circulating apparatus 17 by air outlet 303；Cold In air circulation device 17, the air being discharged is passed through air cleaning unit by the draw of air circulation fans 1702 1701 are filtered, and are entered in air-cooling apparatus 1703 after being cooled down, removing water, are obtained -30 DEG C of clean cold dry airs, dry and cold Air is entered in low-temperature air-cooling device 3 with 0.1m/s by air inlet 304, and material II is cooled down, while cold dry air Be heated, after be discharged by air outlet 303, complete one cycle, after persistent loop 10min, material II is cooled to 10 DEG C, Obtain material III；
E. airtight package
25kg materials III after step D coolings are transported to airtight package device 4 with foraminous conveyer 502 from system discharge end section It is interior, in airtight package device 4, complete weighing and the packaging of material III.
Embodiment 7
The polytetrafluoroethyldispersion dispersion resin particle wet feed for being 60% using 100kg moisture content is dried as raw material, and specific steps are such as Under：
A. feeding
Supplied polytetrafluoroethyldispersion dispersion resin particle wet feed 100kg as starting material by the use of feed conveying device 7, and uniformly arrived On the foraminous conveyer 502 of system feeding section 6；
B. microwave drying
The 100kg starting materials that step A is supplied are entered in drying device 1 by foraminous conveyer 502, starting material is drying dress Advance 8min in putting 1, while by microwave action 8min, the steam in starting material turns to vapor, natural from steam row mouth 104 Overflow, and control 95 DEG C of starting material temperature during drying, obtain the 43.5kg of material I, and the moisture content of material I is 8%；
C. microwave, high temperature super heated steam are dry and clean
The dried 43.5kg materials I of step B are passed in knot screen 2 by foraminous conveyer 502, material I is in knot screen 2 Middle traveling 20min, 20min is acted on by microwave and high temperature super heated steam, while temperature in knot screen 2 is regulated and controled, controlled Temperature is 220 DEG C, and the aquation gas in material I is vapor, and the impurity in material I is gasified, and is led in steam circulation blower fan 1402 Draw under effect, vapor is entered in outlet housing 10 with the steam containing impurity by mesh plate I 204, then passes through outlet housing Steam (vapor) outlet 11 on 10 enters in superheated steam EGR 14；In superheated steam EGR 14, vapor and containing miscellaneous Matter steam passes sequentially through steam purifier 1401, is cooled to 150 DEG C, removes the residual impurity mixed in material I, obtains without miscellaneous The superheated steam of matter, superheated steam are acted on by steam circulation blower fan 1402, are entered in steam superheater 1403, in steam mistake Be heated to be 200-250 DEG C of high temperature super heated steam in hot stove 1403, high temperature super heated steam by steam inlet 13 enter into In fan housing 12, then it is diffused into knot screen 2 by mesh plate II 205；In knot screen 2, high temperature super heated steam with 0.18m/s passes sequentially through foraminous conveyer 502, material I and mesh plate I 204, finally by the steam (vapor) outlet 11 on outlet housing 10, One cycle is completed, after persistent loop 20min, material I is warming up to 210 DEG C, obtains the 40kg of material II, and the moisture content of material II is 0.01%, removal of impurity is 99.55%；
D. cool down
40kg materials II after step C dryings and removal of impurities enter in low-temperature air-cooling device 3 with foraminous conveyer 502, and material II exists Advance 18min in low-temperature air-cooling device 3, obtains the 40kg of material III, and the moisture content of material III is 0.009%.
In low-temperature air-cooling device 3, the air being discharged is entered in cold air circulating apparatus 17 by air outlet 303； In cold air circulating apparatus 17, the air being discharged is filled by the draw of air circulation fans 1702 by purification of air Put 1701 to be filtered, enter in air-cooling apparatus 1703 after being cooled down, removing water, obtain -22 DEG C of clean cold dry airs, do Cold air is entered in low-temperature air-cooling device 3 with 0.13m/s by air inlet 304, and material II is cooled down, while dry and cold sky Gas is heated, after be discharged by air outlet 303, complete one cycle, after persistent loop 19min, material II is cooled to 14 DEG C, obtain material III；
E. airtight package
40kg materials III after step D coolings are transported to airtight package device 4 with foraminous conveyer 502 from system discharge end section It is interior, in airtight package device 4, complete weighing and the packaging of material III.
Embodiment 8
On the basis of embodiment 1-7, with conventional method（Oven Method is dried）Compare, after drying process, polytetrafluoroethylene (PTFE) point Scattered seed passes through detects its tensile strength by standard HGT 3028-1999, its result such as following table：

Claims (10)

  1. A kind of 1. polytetrafluoroethyldispersion dispersion resin particle wet feed drying system, it is characterised in that：Including drying device（1）, removal of impurities Device（2）, low-temperature air-cooling device（3）With airtight package device（305）, drying device（1）, knot screen（2）, low-temperature air-cooling dress Put（3）With airtight package device（305）Pass sequentially through net belt conveying apparatus（5）Connection, net belt conveying apparatus（5）Including live-roller （501）And foraminous conveyer（502）, live-roller（501）Drive foraminous conveyer（502）Motion, and foraminous conveyer（502）Sequentially pass through Drying device（1）, knot screen（2）, low-temperature air-cooling device（3）With airtight package device（305）And form circulation conveying loop；
    The drying device（1）System feeding section is provided with front side of station（6）, system feeding section（6）It is arranged on foraminous conveyer（502） On, and system feeding section（6）Station above be provided with feed conveying device（7）；
    The low-temperature air-cooling device（3）System discharging section is provided with rear side of station（8）, system discharging section（8）It is arranged on foraminous conveyer （502）On, and system discharging section（8）Connect airtight package device（305）.
  2. 2. drying system according to claim 1, it is characterised in that：The drying device（1）Including drying device body （101）And it is arranged on drying device body（101）The microwave leakage of both sides can suppressor I（102）With vertical shift gas plate I（103）, Drying device body（101）On be connected with microwave generator（9）, drying device body（101）Upper end is provided with steam row's mouth （104）；Drying device body（101）Including metal shell.
  3. 3. drying system according to claim 1, it is characterised in that：The knot screen（2）Including knot screen body （201）And it is arranged on knot screen body（201）The microwave leakage of two sides can suppressor II（202）With vertical shift gas plate II （203）, knot screen body（201）On be connected with microwave generator（9）；Knot screen body（201）It is interior to be provided with mesh plate, mesh Plate includes mesh plate I（204）With mesh plate II（205）, mesh plate I（204）It is arranged on knot screen body（201）Top, net Orifice plate II（205）It is arranged on knot screen body（201）Bottom；Knot screen body（201）Upper end is provided with outlet housing（10）, go out Fan housing（10）It is provided with steam (vapor) outlet（11）, knot screen body（201）Lower end is provided with air intake cover（12）, air intake cover（12）On set There is steam inlet（13）；Knot screen body（201）Including metal shell.
  4. 4. drying system according to claim 3, it is characterised in that：The knot screen（2）It is connected with superheated steam circulation Device（14）, superheated steam EGR（14）One end and steam (vapor) outlet（11）Connection, the other end and steam inlet（13）Connection； The superheated steam EGR（14）Including steam purifier（1401）, steam circulation blower fan（1402）And steam superheater （1403）, steam purifier（1401）, steam circulation blower fan（1402）And steam superheater（1403）It is defeated to pass sequentially through steam Send pipe（1404）Connection, and knot screen（2）With steam purifier（1401）, steam circulation blower fan（1402）And steam superheating Stove（1403）Pass through steam pipeline（1404）It is closed circuit to form steam circulation.
  5. 5. drying system according to claim 4, it is characterised in that：The steam circulation blower fan（1402）And steam superheating Stove（1403）Between be provided with threeway I（1405）With threeway II（1406）, threeway I（1405）With threeway II（1406）It is arranged at steaming Vapour delivery pipe（1404）On, and threeway I（1405）It is connected with air bleeding valve（15）, threeway II（1406）It is connected with charge valve（16）.
  6. 6. drying system according to claim 1, it is characterised in that：The low-temperature air-cooling device（3）Including low-temperature air-cooling Device body（301）And it is arranged on low-temperature air-cooling device body（301）The vertical shift gas plate III of both sides（302）, low-temperature air-cooling Device body（301）Upper end is provided with air outlet（303）, lower end is provided with air inlet（304）.
  7. 7. drying system according to claim 6, it is characterised in that：The low-temperature air-cooling device（3）Cold air is connected with to follow Loop device（17）, cold air circulating apparatus（17）One end and air outlet（303）Connection, the other end and air inlet（304）Connection；Institute State cold air circulating apparatus（17）Including air cleaning unit（1701）, air circulation fans（1702）And air-cooling apparatus （1703）, air cleaning unit（1701）, air circulation fans（1702）And air-cooling apparatus（1703）Pass sequentially through air Delivery pipe（1704）Connection, and low-temperature air-cooling device（3）With air cleaning unit（1701）, air circulation fans（1702）And sky Air cooling device（1703）Pass through air delivery pipe（1704）It is closed circuit to form cold air circulation.
  8. 8. drying system according to claim 1, it is characterised in that：The airtight package device（305）Including totally-enclosed The shell of property.
  9. 9. drying system according to claim 1, it is characterised in that：The foraminous conveyer（502）For polytetrafluoroethylene (PTFE) glass Fine material.
  10. 10. the polytetrafluoroethyldispersion dispersion resin particle wet feed drying means in a kind of 1-9 according to claim described in any one, Comprise the following steps：
    A. feeding
    Use feed conveying device（7）Supplied polytetrafluoroethyldispersion dispersion resin particle wet feed as starting material, and uniformly arrive and be System feed zone（6）Foraminous conveyer（502）On；
    B. microwave drying
    The starting material that step A is supplied is with foraminous conveyer（502）Into drying device（1）Interior, starting material is in drying device （1）Middle traveling 5-15min, while by microwave action 5-15min, the aqueous vapor in starting material turns to vapor, and mouth is arranged from steam （104）Naturally overflow, and control starting material temperature≤100 DEG C during drying, obtain material I；
    C. microwave, high temperature super heated steam are dry and clean
    The dried materials I of step B are passed through into foraminous conveyer（502）Incoming knot screen（2）Interior, material I is in knot screen（2） Middle traveling 10-25min, 10-25min is acted on by microwave and high temperature super heated steam, while to knot screen（2）Interior temperature is adjusted Control, control temperature as 200-250 DEG C, the aquation gas in material I is vapor, and the impurity in material I is gasified, in steam circulation Blower fan（1402）Under draw, vapor passes through mesh plate I with the steam containing impurity（204）Into outlet housing（10） In, then pass through outlet housing（10）On steam (vapor) outlet（11）Into superheated steam EGR（14）It is interior；Circulated in superheated steam Device（14）In, vapor and impure steam pass sequentially through steam purifier（1401）, 120-160 DEG C is cooled to, is removed The residual impurity mixed in material I, obtains superheated steam free from foreign meter, and superheated steam passes through steam circulation blower fan（1402）Make With entering steam superheater（1403）In, in steam superheater（1403）200-250 DEG C of hyperthermia and superheating is inside heated to be to steam Vapour, high temperature super heated steam pass through steam inlet（13）Enter air intake cover（12）It is interior, then pass through mesh plate II（205）It is diffused into and removes Miscellaneous device（2）It is interior；In knot screen（2）In, high temperature super heated steam passes sequentially through foraminous conveyer with 0.1-2.0m/s（502）, thing Material I and mesh plate I（204）, finally by outlet housing（10）On steam (vapor) outlet（11）, complete one cycle, persistent loop 10- After 25min, material I is warming up to 195-240 DEG C, obtains material II；
    D. cool down
    Material II after step C dryings and removal of impurities is with foraminous conveyer（502）Into low-temperature air-cooling device（3）Interior, material II exists Low-temperature air-cooling device（3）Middle traveling 10-25min, obtains material III；
    In low-temperature air-cooling device（3）In, the air being discharged passes through air outlet（303）Enter cold air circulating apparatus（17） It is interior；In cold air circulating apparatus（17）Interior, the air being discharged is by air circulation fans（1702）Draw, pass through air Purifier（1701）Filtered, enter air-cooling apparatus（1703）In cooled down, removed water after, obtain -30--15 DEG C it is clean Net cold dry air, cold dry air pass through air inlet with 0.1-2.0m/s（304）Enter low-temperature air-cooling device（3）In, to thing Material II is cooled down, while cold dry air is heated, after pass through air outlet（303）It is discharged, completes one cycle, persistent loop After 10-25min, material II is cooled to 10-19 DEG C, obtains material III；
    E. airtight package
    Material III after step D coolings is with foraminous conveyer（502）Airtight package device is transported to from system discharge end section （305）It is interior, in airtight package device（305）In, the weighing of completion material III and packaging.
CN201710832697.2A 2017-09-15 2017-09-15 Polytetrafluoroethylene dispersion resin particle wet material drying system and method Active CN107449264B (en)

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CN110940178A (en) * 2019-12-03 2020-03-31 中国兵器装备集团自动化研究所 Multistage heating dehydration system and dehydration method for cellulose nitrate
CN116079942A (en) * 2022-11-30 2023-05-09 安徽华塑股份有限公司 Treatment process for reducing impurity particles in PVC resin production process

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CN116079942A (en) * 2022-11-30 2023-05-09 安徽华塑股份有限公司 Treatment process for reducing impurity particles in PVC resin production process

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